Exception related to %s

import java.io.Console;

public class Prompter {
  private Game mGame;

  public Prompter(Game game) {
    mGame = game;
}

  public void play() {
    while (mGame.getRemainingTries() > 0) {
      displayProgress();
      promptForGuess();
    }
  }

public boolean promptForGuess() {
  Console console = System.console();
  String guessAsString = console.readLine("Enter a letter  ");
  char guess = guessAsString.charAt(0);
  return mGame.applyGuess(guess);
}

public void displayProgress() {
  System.out.printf("You have %d tries left to solve: %s\n",
                    mGame.getRemainingTries());
                    mGame.getCurrentProgress();
}
}